COORDINATED PUBLIC WATER SYSTEM PLAN a PART III: FINAL INTEGRATED REPORT Southeast Connecticut Public Water Supply Management Area March 2001 Preparedfor: Department of Public Health Hartford, Connecticut and the Southeast Connecticut Water Utility Coordinating Committee Prepared by: Milone & MacBroom, Inc. 716 South Main Street Cheshire, Connecticut 06410 203) 271- 1773 With assistancefrom Planners Collaborative, Inc. on Water Conservation and Land Use Planning cW MILONE& MACBROOM TABLE OF CONTENTS 1. 0 INTRODUCTION a 2. 0 POPULATION, CONSUMPTION, AND SAFE YIELD PROJECTIONS 2. 1 Introduction 2- 1 2. 2 Municipal Population and Demand Projections 2- 3 2. 3 Exclusive Service Area Population and Demand Projections 2- 4 2. 4 Existing and Future Safe Yields 2- 16 3. 0 INTERCONNECTIONS, JOINT USE FACILITIES, AND SATELLITE MANAGEMENT 3. 1 Interconnections 3- 1 3. 2 Joint Use or Ownership of Facilities 3- 8 3. 3 Satellite Management 3- 10 4. 0 RECOMMENDED MINIMUM DESIGN STANDARDS 4. 1 Overview 4- 1 4. 2 Definition of Terms 4- 2 4. 3 Facility Location 4- 2 4.4 Water Supply Requirements 4- 3 4. 5 Source Protection 4-4 4. 6 Well Construction and Water Quality 4-4 4. 7 Atmospheric Storage Tanks 4- 5 4. 8 On- Site Standby Power 4- 5 4.9 Transmission and Distribution System 4- 6 4. 10 Materials 4- 8 4. 11 Fire Protection 4- 8 4. 12 Service Pipes 4- 10 4. 13 Pumphouse Requirements 4- 10 4. 14 Individual Utility Standards 4- 11 4. 15 Impact on Existing Systems 4- 11 4. 16 Conclusions and Recommendations 4- 12 5. 0 WATER CONSERVATION 5. 1 Introduction 5- 1 5. 2 Supply Side Conservation Measures 5- 4 5. 3 Demand Side Conservation Measures 5- 9 5. 4 Unaccounted- For Water 5- 14 0 5. 5 Water Conservation Recommendations 5- 15 5. 6 Conservation and Future Supplies 5- 25 FINAL INTEGRATED REPORT COORDINATED PUBLIC WATER SUPPLY PLAN SOUTHEAST CONNECTICUT WATER SUPPLY MANAGEMENT AREA MARCH 2001 1 MILONE& MACBROOM 6. 0 ANALYSIS OF ALTERNATIVE FUTURE WATER SUPPLIES AND LAND ACQUISITION FOR PROPOSED STRATIFIED DRIFT WELLS 6. 1 Introduction 6- 1 6. 2 Previous Studies 6- 8 6. 3 Regional Water Supply Source Investigation 6- 11 6. 4 Inventory of Surface Water Supplies 6- 12 6. 5 Inventory of Groundwater Supplies 6- 22 6.6 Investigation of Potential Regionally Significant Surface and Groundwater Supplies 6- 28 6. 6. 1 Jeremy River( Basin 4705) 6- 29 6. 6. 2 Ashaway River( Basin 1003) 6- 30 6. 6. 3 Sherman Brook( Basin 3903) 6- 31 6. 6.4 Green Fall River( Basin 1002) 6- 33 444 6. 6. 5 Mill Brook( Basin 3713) 6- 34 6. 6. 6 Latimer Brook( Basin 2202) 6- 35 6. 6. 7 Shunock River( Basin 1004) 6- 36 6. 6. 8 Broad Brook( Basin 3716) 6- 38 6. 6. 9 Pequonnock river( Great Brook) (Basin 2107) 6- 38 6. 6. 10 Shewville Brook( Basin 3002) 6- 40 6. 6. 11 Gardner Brook( Basin 3906) 6- 41 6. 6. 12 Hunts Brook( Basin 3006) 6- 42 6. 6. 13 Wyassup Brook( Basin 1001) 6- 44 6. 6. 14 Beaver Brook( Basin 3804) 6- 45 6. 6. 15 Pataguanset River( Basin 2205) 6- 46 6. 6. 16 Burnap Brook( Basin 3107) 6- 47 6. 6. 17 Pawcatuck River( Basin 1000) 6- 49 6. 6. 18 Yantic River( Basin 3900) 6- 50 6. 6. 19 Connecticut River( Basin 4000) 6- 52 6. 6. 20 Billings Brook( Basin 3605) 6- 54 6. 6. 21 Oxoboxo River( Basin 3004) 6- 55 6. 6. 22 Great Meadow Brook( Basin 3601) 6- 56 6. 6. 23 Anguilla Brook( Basin 2101) 6- 57 6. 6. 24 Willimantic River( Basin 3100) 6- 58 6. 6. 25 Trading Cove Brook( Basin 3001) 6- 60 6. 6. 26 Pachaug River( Basin 3600) 6- 61 6. 6.27 Whitford Brook( Basin 2104) 6- 62 6. 6. 28 Williams Brook( Basin 2103) 6- 63 6.6. 29 Quinebaug River( Basin 3700) 6- 64 6.6. 30 Myron Kinney Brook( Basin 3604) 6- 65 6. 6. 31 Eightmile River( Basin 4100) 6- 66 6. 6. 32 East Branch Eightmile River( Basin 4802) 6- 67 6. 7 Recommended Future Water Supply Sources 6- 68 6. 8 Land Acquisition for Proposed Stratified Drift Wells 6- 70 6.9 Inventory of Potential Locally Significant Surface and Groundwater Supplies 6- 70 6. 10 Implementation Strategy 6- 84 6. 11 Recommendations 6- 88 6. 12 Demand Management Methods 6- 90 FINAL INTEGRATED REPORT COORDINATED PUBLIC WATER SUPPLY PLAN SOUTHEAST CONNECTICUT WATER SUPPLY MANAGEMENT AREA MARCH 2001 1 MILONE& MACBROOM 7. 0 POTENTIAL IMPACT OF THE COORDINATED PUBLIC WATER SYSTEM PLAN ON OTHER USES OF WATER RESOURCES 7. 1 Jeremy River( Basin 4705) 7- 2 7. 2 Ashaway River( Basin 1003) 7- 3 7. 3 Sherman Brook( Basin 3903) 7- 5 7. 4 Green Fall River( Basin 1002) 7- 6 7. 5 Shunock River( Basin 1004) 7- 8 7. 6 Shewville Brook( Basin 3002) 7- 10 7. 7 Hunts Brook( Basin 3006) 7- 12 7. 8 Wyassup Brook( Basin 1001) 7- 13 7. 9 Pawcatuck River( Basin 1000) 7- 15 7. 10 Yantic River( Basin 3900) 7- 17 7. 11 Connecticut River( Basin 4000) 7- 19 7. 12 Billings Brook( Basin 3605) 7- 21 7. 13 Great Meadow Brook( Basin 3601) 7- 22 7. 14 Anguilla Brook( Basin 2101) 7- 24 7. 15 Myron Kinney Brook( Basin 3604) 7- 26 7. 16 Eightmile River( Basin 4800) 7- 28 7. 17 East Branch Eightmile River( Basin 4802) 7- 29 8. 0 FINANCIAL CONSIDERATIONS 8. 1 Financing Issues 8- 1 8. 2 Planning Cost Estimates for Implementation of Surface Supply Development 8- 3 8. 3 Planning Cost Estimates for Implementation of Groundwater Supply Development 8- 5 8. 4 Planning Cost Estimates for Implementation of Regional Interconnections 8- 8 FINAL INTEGRATED REPORT COORDINATED PUBLIC WATER SUPPLY PLAN SOUTHEAST CONNECTICUT WATER SUPPLY MANAGEMENT AREA MARCH 2001 iii MILONE& MACBROOM aw LIST OF TABLES r,. Table 2- 1 Summary of Demand Projections and Surplus/ Deficits 2- 2 Table 2- 2 Population by Municipality for the Southeast Region 2- 5 Table 2- 3 Projected Town-Wide Future Water Demands 2- 6 Table 2- 4 Planning Horizon Based on Average Day Demand: Existing Conditions 2- 9 00 Table 2- 5 Planning Horizon Based on Average Day Demand: Five- Year Planning Period 2- 10 Table 2- 6 Projected Deficits in Excess of 0. 1 mgd Within the Five- Year Planning Period 2- 11 Table 2- 7 Planning Horizon Based on Average Day Demand: 20- Year Planning Period 2- 12 of mgd the Year Period 2- 13 w, Table 2- 8 Projected Deficits in Excess 0. 1 Within 20- Planning Table 2- 9 Planning Horizon Based on Average Day Demand: 50- Year Planning Period 2- 14 Table 2- 10 Projected Deficits in Excess of 0. 1 mgd Within the 50- Year Planning Period 2- 15 Table 2- 11 Summary of Demand Projections and Surplus/ Deficits 2- 15 Table 2- 12 Planning Horizon: Existing Conditions ( 2000) 2- 18 Table 2- 13 Projected Municipal Populations Versus Water Service Population 2- 21 Table 2- 14 Existing and Future System Safe Yield 2- 22 Table 3- 1 Interconnections Transfer of Water 3- 1 N Existing Providing Daily Table 3- 2 Known Emergency Interconnections 3- 2 Table 3- 3 Active Sale of Excess Water Permits on File with DPH 3- 3 Table 3- 4 Municipalities Served by Multiple Community Public Water Systems 3- 7 Table 3- 5 Contract Operators Providing Service to Multiple Community Public Water Systems 3- 11 Table 3- 6 Satellite Management Needs and Opportunities of ESA Providers 3- 12 Table 3- 7 Small Systems Currently Being Managed or Operated by Others 3- 13 Table 5- 1 Water Conservation Matrix 5- 2 Table 6- 1 Recommended Future Water Supply Development Areas 6- 2 Table 6- 2 Large Public Water Suppliers and/ or Expanded ESA Providers 6- 8 Table 6- 3 Annual Lowest Mean Flows for Indicated Recurrence Intervals Yantic River at Yantic) 6- 13 Table 6- 4 Average Monthly and Annual Precipitation 6- 14 Table 6- 5 Inventory of Potential Regionally Significant Surface Water Supplies 6- 15 Table 6- 6 Summary of Regionally Significant Potential Surface Water Supplies 6- 18 Table 6- 7 Water Quality Impaired Waters of Southeast Connecticut 6- 20 Table 6- 8 Inventory of Potential Regionally Significant Groundwater Supplies 6- 24 Table 6- 9 Summary of Regionally Significant Potential Groundwater Supplies 6- 27 Table 6- 10 Potential Groundwater Supply Sources that Warrant Further Investigation 6- 28 Table 6- 11 Summary of Registered and Permitted Diversions in Table 6- 12 Summary of Registered and Permitted Diversions in— Table 6- 13 Summary of Registered and Permitted Diversions in Table 6- 14 Summary of Registered and Permitted Diversions in Table 6- 15 Summary of Registered and Permitted Diversions in Table 6- 16 Summary of Registered and Permitted Diversions in Table 6- 17 Summary of Registered and Permitted Diversions in Table 6- 18 Summary of Registered and Permitted Diversions in Table 6- 19 Summary of Registered and Permitted Diversions in FINAL INTEGRATED REPORT H COORDINATED PUBLIC WATER SUPPLY PLAN SOUTHEAST CONNECTICUT WATER SUPPLY MANAGEMENT AREA MARCH 2001 w v 1 MILONE& MACBROOM 141` Table 6- 20 Summary of Registered and Permitted Diversions in Table 6- 21 Recommended Future Water Supply Development Areas Table 6- 22 Summary of Future Groundwater Sources Targeted by Individual Utilities 6- 70 Table 6- 23 Inventory of Potential Groundwater Resources of Local Significance 6- 82 Table 6- 24 Inventory of Potential Surface Water Resources of Local Significance 6- 83 Table 6- 25 Summary of Systems Requiring Additional Supplies in Excess of 100,000 gpd in the 50- Year Planning Period and Identification of Potential Future Sources/ Providers 6- 87 ves LIST OF FIGURES Figure 6- 1 Potential Water Supply Sources 6- 3 Figure 6- 2 Five- Year Deficit Projections 6- 4 Figure 6- 3 20- Year Deficit Projections 6- 5 Figure 6- 4 50- Year Deficit Projections 6- 6 Figure 6- 5 Potential Groundwater Supply Stratified Drift Area— Pawcatuck River Basin 6- 71 Figure 6- 6 Potential Groundwater Supply Stratified Drift Area— Yantic River Basin 6- 72 Figure 6- 7 Potential Groundwater Supply